Too coarse for technical decisions. Costs and conversion depth vary significantly.
Construction, systems, safety, documentation and class basis.
Whether called ready or prepared: what is concretely in place is what counts.
Convert the designation into a catalogue of evidence and assumptions.
Breaking down readiness designations must begin at the structural level. This involves verifying whether tank space geometries, double-wall requirements and structural reinforcements for the intended fuel have already been accounted for in the basic design, or whether a subsequent conversion would be necessary. The difference between “space reserved” and “structure designed” can amount to several million euros.
At the systems level, documentation must confirm which supply lines, ventilation concepts and safety interlocks have already been installed or at least prepared in rough form. On LNG-ready vessels, for example, cryogenic piping, gas detection systems and ESD logic are frequently absent – even though the engine room is nominally “prepared.” Without an honest systems survey, any readiness designation remains a statement of intent.
The documentation level is particularly critical. Classification societies require complete baseline documents for a subsequent conversion: hazardous zone plans, HAZID reports, risk assessments in accordance with the IGF Code, and where applicable, approvals for alternative designs. If these documents are missing, the readiness designation is technically worthless because the entire approval process would have to start from scratch.
Finally, the safety level belongs in every serious breakdown. This includes escape route concepts for toxic fuels such as ammonia, personal protective equipment, detection systems and emergency procedures. A vessel can be well prepared structurally and in terms of systems yet remain unconvertible without a safety concept. Identifying precisely these discrepancies is the real value of a professional breakdown.
Those who do not break down readiness designations make investment decisions based on assumptions they have not verified. In practice, this means a shipowner pays a premium for “LNG-ready” in an S&P transaction without knowing whether the actual conversion would cost 3 million or 15 million. The difference between these figures determines the economic viability of the entire remaining service life.
The same applies to charter agreements. If a charterer expects a “methanol-ready” vessel but the technical reality only encompasses a prepared tank space geometry, conflicts arise at the latest during contract review. Clean breakdowns prevent such misunderstandings and create contractual certainty.
The breakdown also has immediate relevance in fleet management. Superintendents need to know which vessels can realistically be converted within what timeframe and budget. Without this clarity, any fleet strategy becomes a gamble – particularly in a regulatory environment that shifts significantly every two to three years.
A recurring pattern emerges with newbuilding series marketed as “dual-fuel-ready.” In several projects, subsequent review revealed that whilst the engine room was spatially prepared, neither the tank structure nor the safety systems met the requirements for an actual conversion. The result: expenditures in the millions that would have been avoidable with an honest breakdown at the time of newbuilding.
In another case, vessels were classified as “ammonia-ready” as part of a fleet modernisation programme, even though only a feasibility study on the principle viability existed. The concrete implementation would have required substantial structural interventions that were neither planned nor budgeted at the time of classification. Such cases undermine confidence in readiness designations as a whole.
A professional breakdown is mandatory in three situations: first, in any S&P transaction where a readiness designation influences the price; second, when developing or revising a fleet decarbonisation strategy; third, when negotiating charter agreements that contain conversion clauses.
The breakdown should cover at least four levels: structure, systems, safety and documentation. Each level must be backed by concrete evidence – not statements of intent. As a rule of thumb: if a readiness designation cannot be substantiated with documents within two working days, it is not operationally reliable.
The credibility of a readiness breakdown depends heavily on who performs it. A breakdown carried out solely by the party marketing the vessel — the yard, the seller or the current owner — carries an inherent conflict of interest, since the same party benefits from a more favourable readiness picture. An independent technical adviser without a commercial stake in the transaction, reviewing the structural, systems, documentation and safety levels against the actual drawings and certificates, produces a breakdown a buyer or charterer can rely on with greater confidence.
In larger transactions, involving the classification society directly in the breakdown, where the vessel's notation already implies a specific readiness level, can shortcut some of the verification work, since the class society has its own documentation of what was actually reviewed and approved. For fleet-wide assessments rather than single transactions, building the capability in-house, so that a superintendent or newbuilding team can perform an initial breakdown before commissioning external verification only for borderline cases, keeps the process both credible and affordable across many vessels.
Rather than treating the breakdown as an exercise performed after a readiness claim already exists, shipowners ordering new tonnage can specify the four levels — structure, systems, documentation, safety — directly in the newbuilding contract, defining precisely what ready is meant to include before the keel is laid. This removes the ambiguity at its source rather than requiring a later reconstruction of what the yard actually delivered.
A specification written this way typically lists, for each level, the concrete deliverable expected at delivery: which drawings must exist, which certificates must be issued, which physical provisions must be installed rather than merely spatially reserved. Yards that are asked to quote against such a specification, rather than against a general readiness label, provide prices that already reflect the true scope, avoiding the situation where a lower initial contract price conceals a significantly higher cost at the point of actual conversion. Shipowners who adopt this practice consistently across an orderbook build a clearer, more comparable readiness profile across their fleet than one relying on marketing terminology alone.